Referee's report by William Cawthorne Unwin, on a paper 'The fracture of metals under repeated alternations of stress' by James Alfred Ewing and J C W Humfrey Sectional Committee: Physics and Chemistry Recommended for publication in Philosophical Transactions, in full. No modifications are necessary but it might be suggested that it be made clear that the range of variations of stress was double the stresses stated. The reproduction of all the illustrations is desirable, gives no general remarks. [Published in Philosophical Transactions A, 1903]. Endorsed on verso as received 30 August 1902. 29 August 1902